Fortis Manufacturing Enhanced AR-15 End Plate System - K1 - Blue Castle Nut - Tapered

Manufactured by Fortis Manufacturing
Manufactured by Fortis Manufacturing
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Standard orders will ship out within 1 business day if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

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When designing the new Fortis Lightweight Enhanced lock nut and endplate system, the goal was to keep weight light and eliminate the use of complicated tools, wrenches, and ratchets. The K1 system has a conical lock nut to seal itself on the endplate. This ultra-precise fit allows the lock nut to be in place and locked in without staking the endplate. There is no ratchet, no set screws, and the K1 castle nut won't back out. No torque wrench is required. Just tighten to 1/4ths, turn off hand tightness.

  • Color: Blue
  • Style: K1 - Tapered
  • Weighs only .55 oz / 16.8 grams total
  • Machined from 7075 T6 Aircraft Grade Aluminum
  • Quick Detach Socket - 360ΒΊ rotational interface
  • No set screws or ratcheting system
  • Made in the USA

Fortis Manufacturing, Inc. is passionate about creating the best AR-15/M16 parts and accessories, using only the highest quality materials available and unrivaled machining. This ensures that every Fortis product meets or exceeds your demands.
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BrandFortis Manufacturing
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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